Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 4 ones in any 4 X 4 X 4 subtriangle.
A153932
Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 4 ones in any 4 X 4 X 4 subtriangle.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =3a(4) =8a(5) =13a(6) =39a(7) =225a(8) =564a(9) =2858a(10) =24012a(11) =101231a(12) =758165a(13) =10608857a(14) =69903886a(15) =854166606a(16) =19155776749a(17) =207379552763
External references
- oeis: A153932